Gritsifter
Gritsifter is quite a rarity among goblins: he thinks too much. Most goblins are happy enough to avoid thinking entirely, but Gritsifter can't seem to avoid analyzing every little thing that happens . . . and then talking about it. And talking about it! Don't rely on him to actually do anything for you, but if you have a question to ponder, (and don't care much whether it is ever answered) Gritsifter is the goblin for the job.